This category is defined as an original design with the primary purpose for allowing the motion of objects. This category may overlap with others as you are trying to decide which category to enter your project. For example, an animated graphic that is part of a video, has voice over, or music may be entered in the Multimedia category. Students who create or upload a graphic and add animation would enter their work in the Animated Graphics category. There are some sites that allow students to create animation using graphics.
These are just a few free web tools sites for animated graphics. There are many more if you search the web.
fluxtime.com
goanimate.com
dvolver.com/
http://www.aniboom.com/